Sound-reproducer.



No. 881,831. PATENTED MAR. 10, 1908.

' R. B. SMITH.

MMWM

v No. 881,831.

UNITED" STATES PAT RICHARD BARTHOLOMEW SMITH, or NEW YoRK, N. Y."

' somvn-nnrnonoonn.

Specification of Letters Patent.

. Patented Mai-ch 10, 1998 Application filed September 17, 1907. SerialNo. 393,399,.

To allwhom itmay concern:

' Be it known that I, RICHARD BARTHOLO- MEW MITH, a subject of the Kingof Great Britain, and a'resident of the city of.l\'eW York, borough ofManhattan, in the county and State of New York, have invented a new andImproved Sound-Re roducer, of which with talking the following is scri.tion, 5

h yinvention relates to. reproducers, such, for instance, as areemployed in connection machine-s, my more particular object ,being toprovide for greater freedom of movement of the stylus: lever .in orderto permit a more faithful reproductionof the a full, ear, and exact devijations and to avoid unduewear upon the record and stylus.

' lates to. means for permitting the stylus lever 20 general directionof travel of the diaphragm.

drawings forming a part of indicate corresponding .parts Moreparticularlystated, my invention reto travelv freely in a directionlateral to the Reference is to be had to the accompanythisspecification,in wh ch similar charactersof reference in all thefigures. I

the 'so-called Figure 1 is acentral vertical section on the line 11 ofFi 2, through a reproducer of my invention, this view showing thediaphragm, the stylus lever.

for actuating the 7 same, and the means employed for allowing the styluslever to turn or rock in a direction parallel to the diaphragm;

gpproximately elevation of the reproducer,

1g. 2 is a rear "showing how the stylus leveris mounted upon .therocking disk by aid of a staff pivotally mounted'upon the rocking disk;Fig. 3 isan enlarged central section on the line 3-3 of 5. tive'showi'nga'difi'erent form of swivel carrier Fig- 1, through the rocking disk,showing more' particularl y how the staff is sup orted thereupon and howthe stylus lever 1s connected with the staff F i 4 is a perspectiveshowing one form of swivel carrier for sup-' porting the stylus lever;Fig. 5 is a perspecfor supporting the stylus lever.

The reproducer casing is shown at 6 and is provided with asleeve 7 towhich the phonograph horn may be connected. The casing is provided withan annular portion 8 threaded internallyand mounted within it is a ring'9.

threaded externally. A diaphragm 10 is mounted within the casingfi andis free to vibrate. A weight -11, having tlfefform of a plate, isprovided with the usual h'oles 12 .with this. weight lland lower end ofa stylus lever 19. of this stylus lever is prhvided Wit ,dison type,equipped with.

through the rocking disk.

whereby it may be partially supported, if deg sired, by aid of aapparatus is not in use. A plate 13, integral formin tion thereof, isconnectedwith til ribbon or string, when thea coptinuag Q. cas ng 6 atthe bottom thereof by aid ofailing-e 14, and]. the plate 13 isprovidedcentrall 'witlfi an aperture 15. Mounted upon the iaphragin 10is a cross-head 16 which is engaged-bye connectim Jink 18, andthethrough the aperture and engages the Theup rend. a hig 20 which supportsa jew el or glass stylus 21v for engaging the record cylinder. A staif22 supports the-stylus lever 19, and for this ur pose a cylindricalscrew 23 is fitted t ig .tly upon the stafi 22, bein thereto so astoavoid t io possibility o-f'its becoming detached. This cylindrical screwis provided with an annular head 24 which jams squarely against thestylus lever 19. The

screw extends directly through the body of said lever; The staff 22 issu inner ends of whic pose. These screws ported by screws 25, the arecupped for the purare provided with heads v26 whereby they may heturned, and are'so the stub shaft 30 is an en'largedlportion 32constituting a head for the threaded portion 31. The stub shaft .0 isprovided at its ends" with reduced bearim; JOltlOIlS 33. One of" thesereduced bearing portions extends througl'i a spider 34 integral with theplate 13. This spider is formedby cutting away theplate 34 so as toleave arcuate slots 35:

A bridge 36 is mounted upon the plate 13" k and secured thereto by ai ofscrews 37. This bridge engages-one of the reducedportions 33 of the stubshaft 30 and formsa bearing therefor.

latter extendsat 27 for this .pur-

occupied by the stylus'lver The bridge 36 and the spider 34 being rigidrelatively to each other;

preferablyshiunkenits Mounted up l and. the rocking disk 29 beingnormally rigid in relation to the stub shaft 30, it follows that therocking dish 2?) turns upon the reduced bearing portions 33 which aresup 5 ported by the bridge 36 and spider The arrangement above describedallows great freedom of movement of the stylus lever 19, this loverbeing free to turn in practicallyany direction occasionally required, 10and being especially free to turn in a dircction corresponding to a.plane lateral to the general direction of vibration of the diaphragrnit).

In the form shown in Fig. 5, the U-shapcd 1:" bracket 38 takes the placeof the rocking disk 29. A stub shaft is provided with reduced ends 40and with an enlarged annular portion ell, the latter engaging directlythe surfaco'oi the U-shaped bracket. 1 Threaded holes 42 are provided.in the U shaped bracket for accomn'iodating the screws 25, as will beunderstood by contrasting Fig. 5 with Fig. 3.

One urpose in increasing the greater freedom ot movement allowed to thestylus le- Venis to enable the Vibratory impulses to be faithfullytransmitted to the diaphragm in orderthat the diaphragm may in turnfaithvfullyreproduce said impulses. Another pur Filinose is to allowthestylus to follow irrcguiarities in the record surface, Without thepossibility of lnutilating either the stylus or the record surface,andalso ithout permit- .ting such irregularities to reproduce a false Themounting above described for versaljoint or of a swivel. I

it will be noted that the ivotal mounting for the stylus lever "19 isisposed in a line LOQWhi'ch, at one joir'itfcoindides with the axialline upon-yll-iic 1 the diskfZQ turns. Such bemg the lcase the rockingofthe disk 29 and or theetylus lever 19 doesznotehan 'e"the posiion oftheimaginary-iine aronn which the tylus leverfifi), turns 'asa centerwhen it rocirs a "plane substantially parallel with gthe geiiralplane'occnpied'b the plate 13 so that i iid lin; alwaysl eoinci eswith'theimly linenpon tikhich-the-disle: rocks as a nig'tmis-orescribed myinvention, t s anddesirelto secure by Letters The oonzbz o rock ng) i anaxis, and a stylus lever oorted inp'o aid member and free to i n on anaide intersected by a prolongar ion 0 the Iaxisof said member, and a'diaif agrn-in operative relation to: said stylus tree'ta i'ocliiipon"anaxis, and a longitudinal tion oi a member mounted he combination of amember mounted stylus lever pivoted upon said member and free to rock,said lever extending diametrically across the axis of said member, and adiaphragm in operative relation to said stylus lever.

3 The combination ol a casing, a vibratory diaphragm mounted therein, a.weight disposed adjacent to said casing and movable relatively thereto,a. rocking member mounted upon said weight and free to turn relativelylo the same in a plane nearly parallel with the plane of said diaphragm,and a stylus lcvcr l'rce to rock in a general direction crossing theplane ol' said diaphragm, the axis of said stylus lever beingintersci-(cd by a prolongation of the axis of said rocking member. r

4. The combination ol a vibalory diaphragm, means for supporting thesame, Weight disposed adjacent to said diaphragm and free tomoveindependently lhereol', a disk mounted upon said weight and free toturn relatively thereto in a plane nearly parallel with the plane olspid diaphragm, and a stylus lcvcr'jouiniileriupon said dish and free torock in a genera direction crossing the plane of said diaphragm, theaxis of said stylus lever being intersected by a prolongation ol theaxis of said disk.

5. The comli inalion ol' a supporting mem ber mounted to rock upon anaxis, a stylus lever mounted upon said supporting member and free torocl; upon an axis, said hwcrbcing s0 positioned that the axis isintersected by a prolongation ol' the axis ol' said supporting member, avilnalory diaphragm, and a. con nection from said vibratory diaphragm tosaid stylus lever.

6. The combination of a vibratory diaphragm, means for supporting thesame, a weight having substantially the form of a flat plate disposedadjacent to said diaphragm and pivotally mounted, said plate being pro-Vidcd 'With a recess, a rocking disk mounlcd within said recess andadapted to move in a plane parallel with said-plate, the center of saidrocking disk being disposed above the center of said diaphragm, a styluslover join"- naled upon said rocking dish and adapted lo rock in a planecrossing the general plane occupied by said rocking disk, the axis ol'said stylus lever being inl'crscctcd by a prolongation of tl axis ofsaid lochiiig disk, and a ill]

